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. Author manuscript; available in PMC: 2006 Jun 30.
Published in final edited form as: J Chromatogr A. 2004 May 7;1035(2):211–219. doi: 10.1016/j.chroma.2004.02.068

Figure 1.

Figure 1

Amino acids 1-34 were investigated in this study. 1 = L-Threonine (L-Thr), 2 = D-Threonine (D-Thr), 3 = L-allo-Threonine (L-allo-Thr), 4 = D-allo-Threonine (D-allo-Thr), 5 = L-N-Methyl-Threonine (L-N-MeThr), 6 = D-N-Methyl-Threonine (D-N-MeThr), 7 = L-allo-N-Methyl-Threonine (L-allo-N-MeThr), 8 = D-allo-N-Methyl-Threonine (D-allo-N-MeThr), 9 = L-homo-Proline = L-piperidine-2-carboxylic acid (L-homoPro), 10 = D-homo-Proline = D-piperidine-2-carboxylic acid (DhomoPro), 11 = L-Proline (L-Pro), 12 = D-Proline (D-Pro), 13 = L-Leucine (L-Leu), 14 = D-Leucine (D-Leu), 15 = L-Isoleucine (L-Ile), 16 = D-Isoleucine (D-Ile), 17 = L-allo-Isoleucine (L-allo-Ile), 18 = D-allo-Isoleucine (D-allo-Ile), 19 = L-Norleucine (L-NorLeu), 20 = D-Norleucine (D-NorLeu), 21 = L-tert.-Leucine (L-t.-Leu), 22 = D-tert.--Leucine (D-t.-Leu), 23 = L-N-Methyl-Leucine (L-N-MeLeu), 24 = D-N-Methyl-Leucine (D-N-MeLeu), 25 = L-N-Methyl-Isoleucine (L-N-MeIle), 26 = D-N-Methyl-Isoleucine (D-N-MeIle), 27 = L-allo-N-Methyl-Isoleucine (L-allo-N-MeIle), 28 = D-allo-N-Methyl-Isoleucine (D-allo-N-MeIle), 29 = L-N-Methyl-Phenylalanine (L-N-MePhe), 30 = D-N-Methyl-Phenylalanine (D-N-MePhe), 31 = L-threo-β-Methyoxytyrosine (L-threo-β-MeOTyr; 2R,3S), 32 = D-threo-β-Methyoxytyrosine (D-threo-β-MeOTyr; 2S,3R), 33 = L-erythro-β-Methyoxytyrosine (L-erythro-β-MeOTyr; 2R,3R), 34 = D-erythro-β-Methyoxytyrosine (D-erythro-β-MeOTyr; 2S,3S). * Indicates chiral centers.